You need a lot of extra weight to push a 54" blade. I have my 214# & 220 pounds of wheel weights on my 1450 dual stick and had a rough time pushing the 54" blade.
1450, dual stick & 220# wheel weights, Sleeve hitch, 2 link chains & adjusters. , 44C deck, front & rear 42" blades, , #2 tiller. 3rd hydraulic valve to operate rear blade.